Plow bottom with detachable plow point



y 1947. H. N. BAKER T 2,424,136

PLOW BOTTOM WITH DETACHABLE PLOW POINT Filed Oct. 25, 1944 U w w INVEN TOR. HERBERT N. BAKER WITNESS x g Q I i 7 f ATTORNEYS Patented July 15 1947 PLOW BOTTOM WITH DETACHABLE PLOW POINT Herbert N. Baker, Syracuse, N. Y., assigncr to Syracuse Chilled Plow 00., Inc., Syracuse, N. Y., a corporation of New York Application October 25, 1944, Serial No. 560,268

12 Claims. 1

This invention relates generally to agricultural implements and more particularly to plows and other earth working tools.

The object and general nature of the present invention is the provision of certain new and useful improvements in plows of the type having a detachable and replaceable plow point, and it is also an important feature of thi invention to provide a novel plow frog, a novel plow point, and a novel wing or share blade, all particularly constructed to facilitate attaching the same to complete the plow bottom and to improve the operating efficiency of the latter as a whole.

More specifically, it is a feature of this invention to provide a plow having improved clamping means for holding the plow point in position firmly and rigidly on the frog. In this connection, it is a further feature of this invention to provide improved clamping means of the Wedge type which not only draws the point into proper position, generally longitudinally of the frog, but also force the point generally laterally against the adjacent edge of the wing or blade and against the landside edge of the frog which portions of the point overlap.

These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description, taken in conjunction with the accompanying drawings.

In the drawings:

Figure 1 is a top or plan view of a plow bottom in'which the principles of the present invention have been incorporated.

Figure 2 is a fragmentary enlarged bottom View.

spectively, along the lines 4-4 and -5--5 of Figure 2.

Referring now to the drawings, more particularly to Figures 1 and 2, the plow bottom which I have chosen to illustrate the present invention is indicated in Figur 1 in its entirety by the reference numeral l and comprises a frog 2 which generally serves as the supporting means for the other parts, a moldboard 3, bolted, as

at 4, to the moldboard-receiving plate 5 of the frog 2. For purposes of clarity the moldboard has been omitted in Figure 2. The frog 2 also .includes a landside plate 6 welded to the plate 5 a short distance laterally inwardly of the land- -wa rd edge 1 of the moldboard plate 5 so as to provide a flange or overhangin construction with which the point, to be described below, particularly cooperates. A brace 9 is fixed, as by welding, to the landside plate 6 and to the moldboard-receiving plate 5, and the intermediate portion of the brace 9 is provided with a section that is apertured to receive the rear portion of a clamping bolt l2, to which detailed reference will be made below.

The plow bottom I also includes a wing or share blade 16 that is bolted, as at 11, to the lower forward portion of the frog, articularly the moldboard-receiving plate 5 thereof, the wing or blade H5, in eifect, forming a continuation of the upper surface of the moldboard 3. The wing or blade It includes a landside edge I9 which is spaced laterally from the landside face or edge of the moldboard and generally in a furrowward direction from the plane of the landside 2| of the plow. The landside 2| is bolted to the lower rear portion of the landside plate 6 of the frog.

A separate detachable and replaceable plow point 25 is fixed to the forwardmost portion of the frog 2 and, as best shown in Figure 3, comprises a flat main body section 26 having a thicker forward portion 21 and a point or soil entering end 28. The plow point 25 also is provided with a. flange 3| disposed in a plane generally parallel to the landside .plate 6, when the point is attached to the plow. The plane of the main body section 26 of the point 25 makes an acute angle with respect to the plane of the plow point landside flange 3|. The latter is provided with a pair of lugs 33 spaced below (above in Figure 3) the face of the rear portion of the plow point, the spacing being such that the landward edge 1 of the frog may be received therebetween. Between the sections 26 and 21 of the point 25 there is an abutment shoulder 34 which lies in a line making an acute angle with respect to the plane of the landside flange 3!. The abutment edge 34 is adapted to engage the landward portion 35 of the forward edge 36 of the frog. The wing I6 has a similar rearwardly facing shoulder 38 which, when the wing is secured in place to the frog, engages the forward edge 36 of the frog furrcwwardly of the point 25. As best shown in Figure 2, the two abutment shoulders 34 and 38 are normally in alignment.

As best shown in Figure 3, the under side of the plow point 25, adjacent the rear and furrowward edges, has a lug 4| having an undercut surface 42. This lug is adapted, when the point 25 is mounted in position on the frog, to extend through an opening 43 in the forward portion of the moldboard-receiving plate of the frog 2, the opening 43 being disposed fairly close to the landside plate 6 of the frog. Cooperating with the lug 4| is a clamping bolt lug 44 having an undercut surface 45 and a pair of opposite shoulders 46 and 41. The portion 48 of the lug 45 that carries the. undercut. surface 44 fits snugly into the opening 43 in the frog, and the shoulders '46 and 41 which are approximately in vertical alignment with the inclined clamping surface 45, en-' gage the under surface of the frog at opposite sides of the opening 43. The lug 44 is secured in any suitable manner to the forward end of the clamping bolt [2, the rear end of which is threaded and receives one or more nuts 49- Which, re.- acting against the brace 9, serves to hold the. point 25 in position. From Figures 4 and 5 it will be noted that the undercut surface 45 of the lug 44 engages the undercut surface 42 on the lug 4|, the latter being carried by the point 25 so that when the nuts 49 are tightened, there is a component of force actingto hold the point 25 down against the upper face of the frog, the shoulders 45 and 4''! bearing against the lower face of the frog at opposite sides of the opening 43'. It will. be noted that the bolt i2 is arranged at an angle to the plane of the landside plate 6 so that the pull exerted by the bolt on the point 25 has a certain amount of laterally directed force component acting to hold the point 25 snugly against the landward edge. l of the frog. Thus, the lugs 33 are held fully engaged over the landward edge 1. Furthermore, since the abutment shoulder 34 on the point 25 is at an angle to the landside flange 3!, when the bolt i2 is tightened the shoulder is pulled against the forward edge 35 of the frog. This serves further to cause the point25 to be drawn laterally inwardly as well as rearwardly relative'to the frog. Thus, the point 2.5 isv securely held in position by what amounts to substantially a direct pull by the clamping bolt I2, the lug 44 thereof reacting against the frog for holding the point down against the upper face of the frog and, at the sametime, holding the point 25 in. its laterally biased position with the lugs 33 engaged over the landside edge of the frog. As best shown in Figure 3, the furrowward edge of the point 25' is beveled, as at 5i, and overhangs the beveled. end [9 of the blade l6, and the bolt l 2 when tightened securely holds these edges together. Preferably, the landward corner 52 of the wing lies behind an extension 53 of the plow point 25, and the shoulder 38 on the wing !5, bearing against the forward edge of the frog, serves to prevent the wing it from being forced rearwardly out of position.

In order to protect the lug 44 and associated parts, a sole plate 55 is welded or otherwise secured to the forward portion of the landside plate 6 and the lower edge of the moldboard-receiving plate 5, preferably along the edge section 35.

This sole plate also reenforces the frog parts.

While I have shown anddescribed above the preferred structureinwhich the principles of the present invention. have been incorporated, it is to be understood that my invention is not'to be limited to the particular details shown and described above, but that, in fact, widely different means may be employed in the practice of the broader aspects of my invention.

What I claim, therefore, and desire to secure byLetters Patent is:

1. In a plow, a frog having an upper point receiving face and an opening therethrough, a detachable point engageable with said face and having a lug extending through said opening, said lug having an undercut edge, and a fastening member having a pair of spaced apart shoulders adapted to engage the underside of said frog at opposite sides of said opening and a lug having an undercut edge adapted toextend into said opening and engage theundercut edge. of the lug on said point, for holding the latter in place against the upper face of said frog.

A plow bottom comprising a frog, a point adapted to be mounted on the upper face of said frog with a portion disposed against the landside face of the. frog, a drawbolt mounted on the frog on the. lower face thereof, cooperating wedge lugs carried by said drawbolt and on the lower face of. said point, said lugs having cooperating undercut surfaces, whereby tightening the drawbolt serves to hold the point down against the upper face of said frog, and means separate from said wedge lugs and carried by said frog and point for drawing "the point laterally against, thelandside face of the frog when the drawbolt is tightened.

3. In a. plow bottom, a frog having a projecting toe portion provided with a landside edge, a de: tachablepoint adapted to fit against the upper side of saidprojecting toe portion and having a landside flange with a portion extending beneath said toe portion of the frog, means connected between the frog and said point for drawing the latter onto the frog in a generallylongitudinal direction, and cooperating surfaces carried, respectively, by said frog and point and angled so that when the point is drawn onto the frog in a generally longitudinal direction, the point is also urged generally laterally so as to engage the landside flange of the plow point against the landside edge of said frog.

4. In a plow bottom, a frog. having. a landside edge, a landside plate which said landside edge overhangs, and a forward edge disposed at: an acutev angle to the plane of said landside plate, a detachable point adapted to overlie the forward upper portion of said frog and havinga landside flange formed to engage said landside ed e. of said frog and a generally rearwardly facing shoulder adapted to engage against the landward portion of the forward edge of said frog, a. Wing adapted to be secured to said frog and'having a beveled edge spaced from the landside edge of the frog and a rearwardly facing shoulder adapted to engage the forward edge of said frog fur,- rowwardly of said point, the latter havingabem. eled edge adapted to overlie the beveled edge. of said wing, and means connected between the frog and said point for drawin the latter onto said frog so as to hold the landside flange of said point against the landside edge of-said frog and also holding the rearwardly facing shoiilrlerv of saidpoint against the forward edge of saidfl'og with the beveled edge of said point overlyingthe beveled edge of said wing.

5. The invention set forth in claim 4,, further characterized by said forward edge of the frog being generally straight and the shoulder on said point and theshoulder on said wing beinggenerally in alignment when the wing and. mint are fixed to said frog,

6. As an article of manufacture, a plowfrog comprising a moldboard-receiving plate, a land.- side-receiving plate fixed to said first plateadiacent but spaced'from the landside edge thereof,

t by v din an overhanging po nt-receivingflange, a lug-receiving opening in said'first plate adjacent said second plate but spaced on the side thereof opposite said flange, and a sole plate fixed to the lower edges, respectively, of said moldboardand landside-receiving plates and substantially under said lug-receiving openmg.

7. In a plow, a frog having an upper point receiving face and an opening therethrough, a detachable point engageable with said face and having a lug extending through said opening, said lug having an undercut edge, and a fastening member having means engageable with the underside of said frog at opposite sides of said opening and a lug having an undercut edge adapted to extend into said opening and engage the undercut edge of the lug on said point, for holding the latter in place against the upper face of said frog.

8. As an article of manufacture, a plow frog comprising a moldboard-receiving section, a landside-receiving plate fixed to said first plate adjacent the landside edge thereof, a lug-receiving opening in said first section adjacent said second section, and a sole plate fixed to the lower edges, respectively, of said moldboardand landside-receiving section and substantially under said lug-receiving opening.

9. As an article of manufacture, a plow frog having a pair of angularly related sections, one at the landward side and the other extending generally downwardly and laterally away from said one section, and a sole plate fixed to the lower portions of said frog sections.

10. In a plow, a frog having an upper point receiving face and an opening therethrough, a detachable point engageable with said face and having a lug extending through said opening, said lug having an undercut edge, and a fastening member having abutment means adapted to engage the underside of the frog adjacent said opening and a lug having an undercut edge adapted to extend into said opening and engage the undercut edge of the lug on said point, for holding the latter in place against the upper face of said frog.

11. In a plow, a frog having a landward edge and a forward edge disposed at an acute angle to the plane of said landward edge, a detachable point adapted to overlie the forward upper portion of said frog and having a landside flange formed to engage said landward edge of said frog and a generally rearwardly facing shoulder adapted to engage against the landward portion of the forward edge of said frog, a wing adapted to be secured to said frog and having a beveled edge spaced from the landward edge of the frog and a rearwardly facing shoulder adapted to engage the forward edge of said frog furrowward of said point, the latter having a beveled edge adapted to overlie the beveled edge of said wing, and means connected between the frog and said point for drawing the latter onto said frog so as to hold the landside flange of said point against the landward edge of said frog and also holding the rearwardly facing shoulder of said point against the forward edge of said frog with the beveled edge of said point overlying the beveled edge of said wing.

12. A plow bottom comprising a frog, a point adapted to be mounted on the upper face of said frog with a portion disposed against the landside face of the frog, a drawbolt mounted on the frog on the lower face thereof, cooperating contacting abutment portions on said point and forward edge of the frog and angled whereby rearward movement of said point relative to the frog serves to cause said portion of the point to be forced laterally against the landside face of the fro said contacting portions extending substantially the width of said point, and means mounting the drawbolt on the frog in a position such that the line of force exerted, when the drawbolt is tightened, extends at an angle to the general plane of the landward face of the frog and intersects said contacting abutment portions at a point adjacent said plane.

HERBERT N. BAKER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,347,167 Baker Apr. 25, 1944 1,327,562 Kelly Jan. 6, 1920 

